“活性碱”对出土干缩变形木质文物的润胀复原研究

Restoration of collapsed archaeological wooden-ware treated by active-alkali

为使干缩变形木质文物恢复原有形状,采用"活性碱"作为润胀剂,对干缩变形的出土木质文物进行了复原试验,并采用环境扫描电镜、傅立叶红外光谱、X射线衍射仪对复原前后的木质成分、结构进行了表征。结果表明,经"活性碱"处理后,干缩木材试样中木质素的含量、纤维素结晶度明显降低;干缩木材中原本塌陷的细胞腔结构得以恢复,同干缩状态相比,复原后木材体积的最大膨胀值达420%,使得干缩变形的木材试样基本恢复了原有形状。

The shrinkage of archaeological waterlogged wood with loss of a big part of the initial volume of the wooden remains has been considered irreversible.Here we use the active-alkali served as a re-swelling reagent can make the collapsed archaeological wood to be almost fully restored its original shape.The properties and the structure of collapsed wood before and after restoration treatment was analyzed by means of ESEM,FT-IR,XRD.The results show that the maximum re-swelling degree of collapsed wood treated by active alkali-urea increased about 420% comparing to collapsed wood sample,which is near to the volume of waterlogged wood sample.